HP 9845 C with 280 option startup failure

[Tequi Lizer]

Tony Duell wrote:
>> Did you ever try to connect your machine to one of the earlier 
>> 5,25"-amigo-drives (like the 82901 or the 9135A)? These drives should be 
>>     
>
> Not yet. I do have an dual 5.25" HPIB drive (I forget the model number), 
> I should dig it out and try it.
>
> How are you getting on with sorting out your machine?
>
> -tony
>
>
>   
Slowly but steadily. I'm currently figuring out some bus & connector 
pinouts, especially around the A34 alpha control logic assembly. Most 
signals are identified, but there are some minor differences between the 
B and C models, which have to be solved. You should always know what you 
do before getting serious...

--Ansgar